airborne vs ambulatory

airborne

adj
  • In or carried by the air. 

  • Fitted to an aircraft. 

  • In flight. 

  • Transported by air in an aircraft. 

noun
  • Military infantry intended to be transported by air and delivered to the battlefield by parachute or helicopter. 

ambulatory

adj
  • Accustomed to move from place to place; not stationary; movable. 

  • Of, relating to, or adapted to walking. 

  • Able to walk about and not bedridden. 

  • Performed on or involving an ambulatory patient or an outpatient. 

  • Not yet legally fixed or settled; alterable. 

noun
  • The round walkway encircling the altar in many cathedrals. 

  • Any part of a building intended for walking in; a corridor. 

How often have the words airborne and ambulatory occurred in a corpus of books? (source: Google Ngram Viewer )